In concept, a ball is the most procedural aspect of the World Cup, arguably the single greatest reminder that no matter how grandiose the world's most popular sporting event can be, soccer's trademark ...

Urethane-covered golf balls generally are favored by better players who are looking for workability and responsiveness. They offer higher spin, a softer feel and exceptional greenside control, ...

Players must adjust to the differences, and that has led to complaints about consistency. The ATP is trying to solve the problem. By Stuart Miller Yellow felt and a rubber core. A tennis ball seems so ...